Who would you cast in Invisible?

I got asked who I would pick to play the characters in Invisible, if  one day it ever got made into a movie.  What do you think of these? 

Beautiful, melancholy 'everygirl' Birdy  could be Jazmine and good looking Logan Lerman  could play Liam. The inimitable Toni Collette would do a great job as Jazmine's mum. I don't normally like Kristen Stewart much but I think she could play the bully Shalini pretty well and Elle Fanning would make an enthusiastic Gabby. 

My first pick for Miss Fraser was Tina Fey and my daughter agreed. But she might be on the older side. Tina Fey ten years ago would be perfect.

Who would you choose?